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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="preprocessor">#ifndef CRYPTO1_H</span></div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="preprocessor">#define CRYPTO1_H</span></div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;</div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="preprocessor">#include &lt;stdint.h&gt;</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="preprocessor">#include &lt;stdbool.h&gt;</span></div><div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;</div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="keywordtype">void</span> Crypto1GetState(uint8_t* pEven, uint8_t* pOdd);</div><div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;</div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment">/* Gets the current keystream-bit, without shifting the internal LFSR */</span></div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;uint8_t Crypto1FilterOutput(<span class="keywordtype">void</span>);</div><div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;</div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment">/* Set up Crypto1 cipher using the given Key, Uid and CardNonce. Also encrypts</span></div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment"> * the CardNonce in-place while in non-linear mode. */</span></div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="keywordtype">void</span> Crypto1Setup(uint8_t Key[6], uint8_t Uid[4], uint8_t CardNonce[4]);</div><div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment">/* Same for nested auth. CardNonce[4]..[7] will contain the parity bits after return */</span></div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="keywordtype">void</span> Crypto1SetupNested(uint8_t Key[6], uint8_t Uid[4], uint8_t CardNonce[8], <span class="keywordtype">bool</span> Decrypt);</div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;</div><div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="comment">/* Load the decrypted ReaderNonce into the Crypto1 state LFSR */</span></div><div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="keywordtype">void</span> Crypto1Auth(uint8_t EncryptedReaderNonce[4]);</div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;</div><div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="comment">/* Generate 8 Bits of key stream */</span></div><div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;uint8_t Crypto1Byte(<span class="keywordtype">void</span>);</div><div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;</div><div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="comment">/* Encrypt/Decrypt array */</span></div><div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="keywordtype">void</span> Crypto1ByteArray(uint8_t* Buffer, uint8_t Count);</div><div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="keywordtype">void</span> Crypto1ByteArrayWithParity(uint8_t* Buffer, uint8_t Count);</div><div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;</div><div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="comment">/* Generate 4 Bits of key stream */</span></div><div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;uint8_t Crypto1Nibble(<span class="keywordtype">void</span>);</div><div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;</div><div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="comment">/* Execute &#39;ClockCount&#39; cycles on the PRNG state &#39;State&#39; */</span></div><div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="keywordtype">void</span> Crypto1PRNG(uint8_t State[4], uint8_t ClockCount);</div><div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;</div><div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="comment">/* Encrypts buffer with consideration of parity bits */</span></div><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="keywordtype">void</span> Crypto1EncryptWithParity(uint8_t * Buffer, uint8_t BitCount);</div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;</div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="comment">/* Encrypts buffer with LFSR feedback within reader nonce and considers parity bits */</span></div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="keywordtype">void</span> Crypto1ReaderAuthWithParity(uint8_t PlainReaderAnswerWithParityBits[9]);</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;</div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="preprocessor">#endif //CRYPTO1_H</span></div></div><!-- fragment --></div><!-- contents -->
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